package StringBuilder_note;

//
public class StringBuilder3 {
    public static void main(String[] args) {
        int[] arr = {1,2,3};

        System.out.println(arrToString(arr));////int类型 转换为 字符类型的数组===
    }
    public static String arrToString(int[] arr){
        StringBuilder sb = new StringBuilder().append("[");
        for (int i = 0; i < arr.length; i++) {
            if (i == arr.length-1){
                sb.append(arr[i]);
            }else {
                sb.append(arr[i]).append(",");
            }
        }sb.append("]");
        return sb.toString();
    }
}
